Okay first u have to have a portable divice it has to be half of the size of a A4 book. APPLIANCES U COULD GET: *phone *psp *ipod *ipad *tablet That's what u need if u don't have access to these devices also make sure the book is thick so pages can block it with not on the pages u blocking it with so they think u really studying.The device must be in the middle of the book so it won't get damaged so atleast 30 pages in front and 30 pages at the back.All Rights Reserved